在不伴有心力衰竭的情况下，对手术耐受力最差的心脏疾病是A．非发绀型先天性心脏病B．风 发布时间：2017-12-16 22:44 │ 来源：www.tikuol.com 题型：单项选择题 问题： 在不伴有心力衰竭的情况下，对手术耐受力最差的心脏疾病是A．非发绀型先天性心脏病B．风湿性心脏病C．高血压性心脏病D．冠状动脉硬化性心脏病E．急性心肌病
题型：单项选择题 Life is not easy, so I’d like to say “When anything happens, believe in yourself.”When I was a young boy, I was 1_shy to talk to anyone. My classmates often _2_me.I was sad but could do nothing, Later, _3_happened, and it changed my life. It was an English speech contest. My mother asked me to _4_it .What a terrible idea! It meant I had to speak before all the teachers and students of my school.“Come on, boy. Believe in yourself. You are sure to 5_the contest.”Then mother and I talked about many different topics. At last I chose the topic “Believe in yourself.”I tried my best to remember all the speech and practiced it over 100 _6_.With my mother’s great love, I did _7_in the contest. I could hardly believe my ears when the news came that I had won the first place, I heard the cheers _8_the teachers and the students. Those classmates_9_once looked down on（看不起）me ,now all said “Congratulations!”to me. My mother hugged me and cried excitedly.Since then, everything has changed for me. When I do anything, I try to tell _10_to be sure and I will find myself. This is not only for a person but also for a country.小题1:A．tooB．soC．quiteD．very小题2:A．made faces atB．looked afterC．caught up withD．laughed at小题3:A．nothingB．somethingC．everythingD．anything小题4:A．take part inB．joinC．getD．make小题5:A．loseB．winC．passD．beat小题6:A．wordsB．topicsC．timesD．sentences小题7:A．wellB．goodC．badD．interested小题8:A．forB．atC．fromD．to小题9:A．whenB．whatC．whichD．who小题10:A．someoneB．meC．everythingD．myself 查看答案
题型：单项选择题 钟表的时针、分钟和秒针的针尖都在做圆周运动，它们的角速度的比是____________，如果三针的长度的比是2：3：3，那么，三针尖的线速度的比是____________，向心加速度的比是____________。 查看答案